Modified polyolefin resin

Patent metadata

Field	Value
Publication number	US-10774167-B2
Application number	US-201616064163-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Dec 22, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

The present invention provides a modified polyolefin resin that can form a coating that exhibits excellent adhesion to a low-polarity base material, especially a poorly adherable polyolefin base material with no surface treatment even when being dried at low temperatures and has flexibility (bendability). Provided is a modified polyolefin resin that is a modified product of a polyolefin resin having a melting point (Tm) by a differential scanning calorimeter (DSC) of 60 to 165° C. with a modifier comprising the following (A):
(A) a monomer mixture comprising Monomer Group (A-1) and Monomer Group (A-2) with a weight ratio of Monomer Group (A-1) to Monomer Group (A-2) ((A-1)/(A-2)) of 30/70 to 50/50.

First claim

The invention claimed is:

1. A modified polyolefin resin, obtained by a process comprising:
modifying a polyolefin resin having a melting point (Tm) measured by a differential scanning calorimeter (DSC) of 60 to 165° C. with a modifier,
wherein the modifier comprises:
(A) a monomer mixture comprising Monomer Group (A-1) and Monomer Group (A-2) with a weight ratio of Monomer Group (A-1) to Monomer Group (A-2) ((A-1)/(A-2)) of 30/70 to 50/50, and (B) chlorine:
Monomer Group (A-1): two or more monomers comprising an ethylenically unsaturated bond and a functional group wherein when a homopolymer is made from each monomer of said two or more monomers said homopolymer has a glass transition temperature (Tg) of 60° C. or more, and
Monomer Group (A-2): two or more monomers comprising an ethylenically unsaturated bond and a functional group wherein when a homopolymer is made from each monomer of said two or more monomers said homopolymer has a glass transition temperature (Tg) of 30° C. or less.

2. The modified polyolefin resin according to claim 1 , wherein the functional group of the Monomer Group (A-1), the functional group of the Monomer Group (A-2), or both, is one or more selected from the group consisting of a carboxy group, a group represented by —(C═O)—O—, a hydroxy group, an ether group, and an optionally substituted amino group.

3. The modified polyolefin resin according to claim 1 , wherein at least one of the one or more monomers included in Monomer Group (A-1) comprises a carboxyl group as the functional group.

4. The modified polyolefin resin according to claim 1 , wherein Monomer Group (A-1) includes one or more selected from the group consisting of a (meth)acrylic acid and an alkyl (meth)acrylate.

5. The modified polyolefin resin according to claim 1 , wherein at least one of the one or more monomers included in Monomer Group (A-2) comprises one or more selected from the group consisting of a hydroxy group and an ether group as the functional group.

6. The modified polyolefin resin according to claim 1 , wherein Monomer Group (A-2) includes one or more selected from the group consisting of an alkyl (meth)acrylate, a hydroxyalkyl (meth)acrylate, and an alkoxy alkyl (meth)acrylate.

7. The modified polyolefin resin according to claim 1 , wherein the modifier further comprises:
(C) one or more selected from the group consisting of an α,β-unsaturated carboxylic acid and a derivative thereof.

8. A resin composition, comprising the modified polyolefin resin according to claim 1 .

9. An organic solvent-containing resin composition, comprising:
the modified polyolefin resin according to claim 1 ; and
an organic solvent.

10. An aqueous resin composition, comprising:
the modified polyolefin resin according to claim 1 ; and
water.

11. A method for manufacturing a modified polyolefin resin, the method comprising:
modifying a polyolefin resin having a melting point (Tm) measured by a differential scanning calorimeter (DSC) of 60 to 165° C. with a modifier comprising:
(A) a monomer mixture comprising Monomer Group (A-1) and Monomer Group (A-2) with a weight ratio of Monomer Group (A-1) to Monomer Group (A-2) ((A-1)/(A-2)) of 30/70 to 50/50, and (B) chlorine:
Monomer Group (A-1): two or more monomers comprising an ethylenically unsaturated bond and a functional group wherein when a homopolymer is made from each monomer of said two or more monomers said homopolymer has a glass transition temperature (Tg) of 60° C. or more, and
Monomer Group (A-2): two or more monomers comprising an ethylenically unsaturated bond and a functional group wherein when a homopolymer is made from each monomer of said two or more monomers said homopolymer has a glass transition temperature (Tg) of 30° C. or less.

12. The method according to claim 11 , wherein the modifier further comprises: (C) one or more selected from the group consisting of an α,β-unsaturated carboxylic acid and a derivative thereof.

13. The method according to claim 12 , comprising modifying the polyolefin resin with the one or more selected from group consisting of (B) and (C) and then with (A).

Assignees

• Jujo Paper Co Ltd

Inventors

• Komoto Naosuke

Classifications

• C08F255/00 Primary

  Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 · CPC title

• C08F8/20

  Halogenation · CPC title

• C08F8/10

  Acylation · CPC title

• C08J7/043

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• C08J7/042

  with two or more layers, where at least one layer of a composition contains a polymer binder · CPC title